1. A system for applying reduced pressure tissue treatment to a wound site, the system comprising:
a dressing that is bioresorbable and comprising a casing having microparticles that are bioresorbable, constrictions at repeating intervals, and adapted to have pores, the dressing adapted to be disposed adjacent the wound site;
a drape adapted to cover the dressing and create a sealed space containing the dressing;
a reduced pressure source adapted to supply reduced pressure; and
a reduced pressure delivery tube adapted to be fluidly coupled between the reduced pressure source and the dressing to provide the reduced pressure to the dressing.
2. The system of claim 1, further comprising a distribution manifold fluidly coupled to the reduced pressure delivery tube to distribute the reduced pressure.
3. The system of claim 2, wherein the distribution manifold compresses the dressing against the wound site.
4. The system of claim 1, wherein the casing comprises a substantially cylindrical shape.
5. The system of claim 1, wherein the casing comprises a substantially cylindrical shape and the microparticles are disposed within the casing.
6. The system of claim 1, wherein the casing further comprises a porogen system.
7. The system of claim 6, wherein the porogen system forms the pores in the casing in response to contact with a fluid.
8. The system of claim 7, wherein the fluid comprises a body fluid.
9. The system of claim 7, wherein the fluid comprises water.
10. The system of claim 6, wherein the porogen system comprises sodium carbonate and an acid.
11. The system of claim 6, wherein the porogen system comprises a salt.
12. The system of claim 1, wherein a size of the microparticles is between about 400 and about 600 microns.
13. The system of claim 1, wherein the microparticles comprise a PLA:PCL (poly(lactide):polycaprolactone) copolymer.
14. The system of claim 13, wherein the ratio of PLA:PCL is about 90:10.
15. The system of claim 13, wherein the ratio of PLA:PCL is about 80:20.
16. The system of claim 1, wherein the microparticles comprise microspheres.
17. The system of claim 1, wherein the casing has a porosity between about 50% and about 90%.
18. The system of claim 1, wherein the casing has a porosity greater than about 70%.
19. The system of claim 1, wherein the casing has a porosity of about 50%.
20. The system of claim 1, wherein a diameter of the pores of the casing is between about 100 microns and about 500 microns.
21. The system of claim 1, wherein a size of the microparticles is greater than a diameter of the pores.
22. The system of claim 1, wherein the casing further comprises a plasticizer.
23. The system of claim 1, wherein the dressing comprises a first dressing, the system further comprising a second dressing twisted together with the first dressing.
24. The system of claim 1, wherein the dressing comprises a first dressing, the system further comprises a second dressing braided together with the first dressing.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A pump apparatus comprising:
a particulate pump defining a passage extending from an inlet to an outlet; and
a duct in flow communication with the outlet, the duct including a deconsolidator configured to fragment particle agglomerates received from the passage.
2. The pump apparatus as recited in claim 1, wherein the deconsolidator is selected from the group consisting of a grinder, a vibrator, a mesh, a divider and combinations thereof.
3. The pump apparatus as recited in claim 1, wherein the duct is connected at the outlet of the passage.
4. The pump apparatus as recited in claim 1, wherein the duct includes a duct outlet and a movable door having open and closed positions with respect to the duct outlet.
5. The pump apparatus as recited in claim 1, wherein the deconsolidator is a divider splitting the duct into multiple passages.
6. The pump apparatus as recited in claim 5, wherein the multiple passages turn laterally with respect to the passage of the particulate pump.
7. The pump apparatus as recited in claim 5, wherein the multiple passages are laterally offset from each other.
8. The pump apparatus as recited in claim 1, wherein the deconsolidator includes a grinder.
9. The pump apparatus as recited in claim 1, wherein the deconsolidator includes a vibrator.
10. The pump apparatus as recited in claim 1, wherein the deconsolidator includes a mesh.
11. The pump apparatus as recited in claim 1, wherein the duct includes a hard-face coating.
12. A pump apparatus comprising:
a particulate pump defining a passage extending from an inlet and an outlet; and
a duct in flow communication with the outlet, the duct including a duct outlet and a moveable door having open and closed positions with respect to the duct outlet.
13. The pump apparatus as recited in claim 12, wherein the movable door is biased toward the closed position.
14. The pump apparatus as recited in claim 12, wherein the movable door is movable in response to a pressure in the duct exceeding a threshold.
15. The pump apparatus as recited in claim 12, wherein the movable door is moveable by non-electronic actuation.
16. The pump apparatus as recited in claim 12, wherein the movable door seals against the duct outlet in the closed position.
17. A method of operating a pump apparatus, the method comprising:
moving a particulate material through a particulate pump that defines a passage that extends from an inlet to an outlet; and
fragmenting particle agglomerates of the particulate material with a deconsolidator in a duct that is in flow communication with the outlet of the passage.
18. The method as recited in claim 17, further comprising controlling discharge of the particulate material from the duct by actuating a movable door between open and closed positions with respect to a duct outlet of the duct.
19. The method as recited in claim 18, wherein the actuating includes actuating the movable door in response to a pressure in the duct.
20. The method as recited in claim 19, further comprising maintaining the movable door in the closed position in response to the pressure in the duct being below a threshold, to limit a backflow of pressure into the duct.